Digital System Integration Information; Wiring Variations; Wiring Procedure - Honeywell ST 700 User Manual

Transmitter voltage (V
XMTR MIN
barriers) needed for digital communications.
Transmitter loop parameters are as follows:
R = maximum loop resistance (barriers plus wiring) that will allow proper Transmitter
LOOP MAX
operation and is calculated as R
In this calculation:
V = 10.8V + V
XMTR MIN
V = 1.1V, lightning protection option, LP
LP
V = 2.3V, remote meter
SM
Note that V should only be considered if a remote meter will be connected to the transmitter.
SM
The positive and negative loop wires are connected to the positive (+) and negative (–) terminals on
the terminal block in the Transmitter Electronics Housing.
Barriers can be installed per Honeywell's instructions for Transmitters to be used in intrinsically safe
applications.

4.6.2 Digital System Integration Information

Transmitters that are to be digitally integrated to Honeywell's Total Plant Solution (TPS) system will
be connected to the Pressure Transmitter Interface Module in the Process Manager, Advanced
Process Manager or High Performance Process Manager through a Field Termination Assembly.
Details about the TPS system connections are given in the PM/APM SmartLine Transmitter
Integration Manual, PM12-410, which is part of the TDC 3000
If you are digitally integrating a Transmitter in an Allen Bradley Programmable Logic Controller
(PLC) process system, the same Field Terminal Assembly (FTA) and wiring procedures used with
Honeywell's TPS system are also used with the Allen-Bradley 1771 and 1746 platforms.

4.6.3 Wiring Variations

The above procedures are used to connect power to a Transmitter. For loop wiring and external
wiring, detailed drawings are provided for Transmitter installation in non-intrinsically safe areas and
for intrinsically safe loops in hazardous area locations.
If you are using the Transmitter with Honeywell's TPS system, see PM/APM Smartline Transmitter
Integration Manual, PM12-410, which is part of the TDC 3000

4.6.4 Wiring Procedure

1. See Figure 15, above, for parts locations. Loosen the end cap lock using a 1.5mm Allen wrench.
2. Remove the end cap cover from the terminal block end of the Electronics Housing.
3. Feed loop power leads through one end of the conduit entrances on either side of the
Electronics Housing. The Transmitter accepts up to 16AWG wire.
4. Plug the unused conduit entrance with the appropriate plug for the environment.
5. Connect the positive loop power lead to the positive (+) terminal and the negative loop power
lead to the negative (-) terminal. Note that the Transmitter is not polarity-sensitive.
6. Replace the end cap, and secure it in place.
Page 22
), including the required 250 ohms of resistance (typically within the
= (V
LOOP MAX SUPPLY MIN
+ V
LP SM
ST 700 SmartLine Pressure Transmitters User's Manual
)  21.8mA.
– V
XMTR MIN
X
system bookset.
X
system bookset.
Revision 8.0